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<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>给下拉框数据分组</title>
    <script type="text/javascript" language="JavaScript">
        
        
    </script>
</head>
<body>
<select>
    <OPTGROUP LABEL="山东省">
        <OPTION>济南</OPTION>
        <OPTION>青岛</OPTION>
        <OPTION>潍坊</OPTION>
    </OPTGROUP>
    <OPTGROUP LABEL="河北省">
        <OPTION>保定</OPTION>
        <OPTION>沧州</OPTION>
        <OPTION>石家庄</OPTION>
    </OPTGROUP>
    
</select>

<a href="#" onclick=window.external.showBrowserUI("PrivacySettings",null)>internet选项</a>
</body>
</html>